胎动不安又称()。 A.胎漏 B.漏胎 C.胎气不安 D.激经 E.以上均不是 发布时间:2017-09-11 18:10 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 胎动不安又称()。A.胎漏B.漏胎C.胎气不安D.激经E.以上均不是
题型:单项选择题 A1/A2型题 The meeting we had ________ to _______ us finally. [ ]A. looked forward; disappointing B. been looked forward; disappointed C. looked forward; disappointed D. been looked forward; disappointing 查看答案
题型:单项选择题 A1/A2型题 在单级萃取器中用纯溶剂S提取A、B两组分混合液中的溶质A。静置分层后,测得两相的平衡组成分别为 萃取相:yA=0.39,yB=0.12 萃余相:xA=0.18,xB=0.77 则萃取剂的选择性系数β为()。A.2.17B.13.9C.6.42D.2.96 查看答案